Boat



March 12, 1929. E. G. MALusbN BOAT- Filed Oct. 8, v192v INVENTOR ATTO R N EY Patented Mar. 12, 1929 serene sis twain EDWARD G. MALLISON, 0F XVASEINGTGN, NORTH CABOLIHA. l

BOAT.

Application filed October 8, 1927. Serial No. 224,931.

a craft with greater stability, and in a sail boat one able to carry more sail.

ln carrying out the invention 1 provide a hull with a right angular channel extending axially of the hull bottom from stem to stern the upper boundary of the channel being fiat or arched transversely. The walls of the channel thus form two parallel submerged bilges in the hull, making it somewhat like a catamaran. v I

My invention, therefore, consists in a water craft having a longitudinal right angular channel of desired contour from how to stern. It comprises other more specific features, the novelty of which Wlll be herelna ter fully described and will be definitely indicated in the appended claim.

In the drawings illustrating the invent-ion:

Figure 1 is a side elevation of a boat embodying my improvements;

Fig. is a cross section on the plane 22 of F Fig. 3 is Figs. 4 and 5 show modifications of the contour of the channel.

Referring now particularly to the drawings, 1 form longitudinally in the hull a VGl'blCEtl Walled recess forming a deep channel. T he recess has vertical walls 1, 1, thus formingtwo immersion sides or bilges of the boat 3, 4 which steady its progress in the water and resist drifting. The horizontal floor 2 of the recess may be plane from stem to stern, indicated in Fig. 2 and by dotted lines in Fig. 1 but the longitudinal contour of the hull is curved as indicated at 5 in Fig;

a plan on a reduced scale;

1. The longitudinal depression enables the craft to stand an exceptionally large amountot sail area, the wind-like sides have a strong leverage against the water and requires an exceptionally small amount of ballast.

The longitudinal depression practically divides the hull into-two separate chambers almost the entire length of the boat and acts very much as does a catamaran in the water in resi-stingdrifting and in rapidity of travel. The floor of the recess otters almost no resistance to translation and the walls of the channel increase the superficial area and increase buoyancy. The floor may be of-curved contour 1nstead of flat; In idig'. 4 it is of convex form transversely and in Fig". 5 concave. T he particular contour may be detern'iined according to the choice oi the des gner.

The plane form of Fig. 2 otters slightly less resistance while the curved form affords more stability. Aside from the features described, the boat'may be of normal equipment, rudder, bowsprit, etc. I would remark that the invention is capable of slight modifications within the scope of my invention; the floor.

of the channel extending longitudinally midshi s, while plane in cross section, may in longitudinal section be somewhat curved.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent is:

A boat having a hull with a right angular channel centrally from stein to stern in its bottom, the top wall 01. the channel forming a curved transverse convex surface on the water, thus forming double bilges and stabilizing the craft.

In testimony whereof I afiiX my signature.

EITVVARD G. MALLISON. 

